Casual Base Layer Shirts & Tops
70 items found
Your Selections
Search Results
![Gray Tyndale FRC Big & Tall Layer 1 Long Sleeve T-Shirt](https://m.media-amazon.com/images/I/81kBaz4WJ5L._AC_SR768,1024_.jpg)
![Gray Timberland PRO FR Cotton Core Long-Sleeve Pocket T-Shirt](https://m.media-amazon.com/images/I/71KQ40wbEpL._AC_SR768,1024_.jpg)
![Gray Timberland PRO FR Cotton Core Long-Sleeve Pocket T-Shirt](https://m.media-amazon.com/images/I/81p+-VyN9-L._AC_SR768,1024_.jpg)
![White Under Armour UA Tac Heat Gear Compression Tee](https://m.media-amazon.com/images/I/711U-ks2+iL._AC_SR768,1024_.jpg)
![White Under Armour UA Tac Heat Gear Compression Tee](https://m.media-amazon.com/images/I/710gxOx65rL._AC_SR768,1024_.jpg)
Low Stock
![Blue Arc'teryx Kyanite Baselayer Crew](https://m.media-amazon.com/images/I/71elnrIi2EL._AC_SR768,1024_.jpg)
![Blue Arc'teryx Kyanite Baselayer Crew](https://m.media-amazon.com/images/I/811ffHkBceL._AC_SR768,1024_.jpg)
![Black Under Armour UA Tac Tech Tee](https://m.media-amazon.com/images/I/61qQXuQlTnL._AC_SR768,1024_.jpg)
![Black Under Armour UA Tac Tech Tee](https://m.media-amazon.com/images/I/81kQ9Sa5ClL._AC_SR768,1024_.jpg)
![Green Arc'teryx Taema Thermal Crew Long Sleeve](https://m.media-amazon.com/images/I/711EhV4jYaL._AC_SR768,1024_.jpg)
![Green Arc'teryx Taema Thermal Crew Long Sleeve](https://m.media-amazon.com/images/I/91dBS1JHThL._AC_SR768,1024_.jpg)
![White Free People Clean Lines Cami](https://m.media-amazon.com/images/I/71KXTD-vDOL._AC_SR768,1024_.jpg)
![White Free People Clean Lines Cami](https://m.media-amazon.com/images/I/714ZIkWg9jL._AC_SR768,1024_.jpg)
![Black Jamie Sadock Sunsense® Mandarin Collar Layering Shirt](https://m.media-amazon.com/images/I/81Q6vwOFmML._AC_SR768,1024_.jpg)
![Black Jamie Sadock Sunsense® Mandarin Collar Layering Shirt](https://m.media-amazon.com/images/I/81q8gf0G9gL._AC_SR768,1024_.jpg)
![Navy Under Armour UA Tac Tech Long Sleeve Tee](https://m.media-amazon.com/images/I/611ywNcdtIL._AC_SR768,1024_.jpg)
![Navy Under Armour UA Tac Tech Long Sleeve Tee](https://m.media-amazon.com/images/I/813SCjvdJBL._AC_SR768,1024_.jpg)
Low Stock
![Black Icebreaker 260 Tech Merino Baselayer Long Sleeve Crewe](https://m.media-amazon.com/images/I/71LUUskvRNL._AC_SR768,1024_.jpg)
![Black Icebreaker 260 Tech Merino Baselayer Long Sleeve Crewe](https://m.media-amazon.com/images/I/91+BDk2P28L._AC_SR768,1024_.jpg)
![White Madewell Refined Easy Tee.](https://m.media-amazon.com/images/I/61agLvFT4mL._AC_SR768,1024_.jpg)
![White Madewell Refined Easy Tee.](https://m.media-amazon.com/images/I/71swJduvFRL._AC_SR768,1024_.jpg)
![Gray Smartwool Merino 250 Base Layer Crew](https://m.media-amazon.com/images/I/81kZcjtnlfL._AC_SR768,1024_.jpg)
![Gray Smartwool Merino 250 Base Layer Crew](https://m.media-amazon.com/images/I/91HCB80r+3L._AC_SR768,1024_.jpg)
Low Stock
![Blue Arc'teryx Kyanite Baselayer Zip Neck](https://m.media-amazon.com/images/I/710XkJCnBpL._AC_SR768,1024_.jpg)
![Blue Arc'teryx Kyanite Baselayer Zip Neck](https://m.media-amazon.com/images/I/71Vz1K137mL._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Kids Pepper Skins Crew Neck (Toddler/Little Kids/Big Kids)](https://m.media-amazon.com/images/I/810rnR4Yu+L._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Kids Micro-Elite Chamois Crew Neck (Little Kids/Big Kids)](https://m.media-amazon.com/images/I/81uS0z-CwxL._AC_SR768,1024_.jpg)
![Tan Icebreaker Siren Merino Long Sleeve Sweetheart](https://m.media-amazon.com/images/I/61bH-KKty7L._AC_SR768,1024_.jpg)
![Black Hot Chillys Kids Originals Crew Neck (Little Kids/Big Kids)](https://m.media-amazon.com/images/I/81AUvfXF5GL._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Peach Solid Roll T-Neck](https://m.media-amazon.com/images/I/81ytqOhBQ8L._AC_SR768,1024_.jpg)
![Black Hot Chillys Peach Solid Roll T-Neck](https://m.media-amazon.com/images/I/81hJDVRE0aL._AC_SR768,1024_.jpg)
Low Stock
![Black Smartwool Classic Thermal Merino Base Layer Colorblock 1/4 Zip](https://m.media-amazon.com/images/I/61RO85WvEnL._AC_SR768,1024_.jpg)
Low Stock
![Black L.L.Bean Wicked Warm Expedition Underwear Top (Big Kids)](https://m.media-amazon.com/images/I/51PAs91kGZL._AC_SR768,1024_.jpg)
![Black Under Armour Base Crew 3.0](https://m.media-amazon.com/images/I/61y8V6qtKeL._AC_SR768,1024_.jpg)
![Black Under Armour Base Crew 3.0](https://m.media-amazon.com/images/I/71ZryktW3mL._AC_SR768,1024_.jpg)
Low Stock
![Black Smartwool Classic Thermal Merino Base Layer 1/4 Zip](https://m.media-amazon.com/images/I/61TUJRgHNnL._AC_SR768,1024_.jpg)
![Black Smartwool Classic Thermal Merino Base Layer 1/4 Zip](https://m.media-amazon.com/images/I/71Q0xDMxEEL._AC_SR768,1024_.jpg)
![Black 2(X)IST 3-Pack ESSENTIAL Jersey V-Neck T-Shirt](https://m.media-amazon.com/images/I/61KXen95uBL._AC_SR768,1024_.jpg)
![White 2(X)IST Pima Slim Fit Deep V-Neck T-Shirt](https://m.media-amazon.com/images/I/817RC4k6KnL._AC_SR768,1024_.jpg)
![White 2(X)IST Pima Slim Fit Deep V-Neck T-Shirt](https://m.media-amazon.com/images/I/81pIz4HVJoL._AC_SR768,1024_.jpg)
![Black Hot Chillys Pepper Skins Crew Neck](https://m.media-amazon.com/images/I/61OS4OqjX9L._AC_SR768,1024_.jpg)
![Black Hot Chillys Pepper Skins Crew Neck](https://m.media-amazon.com/images/I/71EmJKK6dRL._AC_SR768,1024_.jpg)
Low Stock
![Green Free People Pretty Little Thermal](https://m.media-amazon.com/images/I/81GQ3-8dY7L._AC_SR768,1024_.jpg)
![Green Free People Pretty Little Thermal](https://m.media-amazon.com/images/I/81huDGsHY9L._AC_SR768,1024_.jpg)
![Blue Free People Love Letter Sweetheart Ca](https://m.media-amazon.com/images/I/81EDASEcUDL._AC_SR768,1024_.jpg)
![Blue Free People Love Letter Sweetheart Ca](https://m.media-amazon.com/images/I/8113CIsgqvL._AC_SR768,1024_.jpg)
Low Stock
![Gray Smartwool Classic Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/71T1MD2kuwL._AC_SR768,1024_.jpg)
![Gray Smartwool Classic Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/91Kt7QyqEuL._AC_SR768,1024_.jpg)
Low Stock
![Blue Faherty Long Sleeve Cloud Henley](https://m.media-amazon.com/images/I/71UDPVlEa4L._AC_SR768,1024_.jpg)
![Blue Faherty Long Sleeve Cloud Henley](https://m.media-amazon.com/images/I/81EgtDsicXL._AC_SR768,1024_.jpg)
Low Stock
![Purple L.L.Bean Pima Crew Neck Long Sleeve](https://m.media-amazon.com/images/I/61CTLte9YyL._AC_SR768,1024_.jpg)
![Purple L.L.Bean Pima Crew Neck Long Sleeve](https://m.media-amazon.com/images/I/71LISaUx6KL._AC_SR768,1024_.jpg)
![White Free People Love Letter Long Sleeve](https://m.media-amazon.com/images/I/71fO5njZXYL._AC_SR768,1024_.jpg)
![White Free People Love Letter Long Sleeve](https://m.media-amazon.com/images/I/71BmgPEA3uL._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Clima-Wool Zip-T](https://m.media-amazon.com/images/I/61tLOc0m5VL._AC_SR768,1024_.jpg)
![Black Hot Chillys Clima-Wool Zip-T](https://m.media-amazon.com/images/I/71OwVwXfhnL._AC_SR768,1024_.jpg)
Low Stock
![Gray Hot Chillys Clima-Wool Crew](https://m.media-amazon.com/images/I/71Fal6Nv-3L._AC_SR768,1024_.jpg)
![Gray Hot Chillys Clima-Wool Crew](https://m.media-amazon.com/images/I/91udVy9uGEL._AC_SR768,1024_.jpg)
Low Stock
![Black Icebreaker Merino 260 Tech Long Sleeve Half Zip](https://m.media-amazon.com/images/I/61QkSe6yzyL._AC_SR768,1024_.jpg)
![Black Icebreaker Merino 260 Tech Long Sleeve Half Zip](https://m.media-amazon.com/images/I/81U8j5ARPCL._AC_SR768,1024_.jpg)
![Purple tasc Performance NOLA Long Sleeve](https://m.media-amazon.com/images/I/713LH-taZXL._AC_SR768,1024_.jpg)
![Purple tasc Performance NOLA Long Sleeve](https://m.media-amazon.com/images/I/71T7ct5q2aL._AC_SR768,1024_.jpg)
![Burgundy Icebreaker Merino 260 Tech Long Sleeve Half Zip](https://m.media-amazon.com/images/I/61DlRYoNrGL._AC_SR768,1024_.jpg)
![Burgundy Icebreaker Merino 260 Tech Long Sleeve Half Zip](https://m.media-amazon.com/images/I/81pfTZJGAsL._AC_SR768,1024_.jpg)
Low Stock
![Navy Helly Hansen Lifa Merino Midweight Graphic](https://m.media-amazon.com/images/I/81oKvKM5ZNL._AC_SR768,1024_.jpg)
![Navy Helly Hansen Lifa Merino Midweight Graphic](https://m.media-amazon.com/images/I/81l691-hWFL._AC_SR768,1024_.jpg)
![Black Smartwool Classic All-Season Merino Base Layer 1/4 Zip](https://m.media-amazon.com/images/I/616soOCIk8L._AC_SR768,1024_.jpg)
![Black Smartwool Classic All-Season Merino Base Layer 1/4 Zip](https://m.media-amazon.com/images/I/71DEJMe0-ML._AC_SR768,1024_.jpg)
Low Stock
![Brown Smartwool Classic Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/713Pm7KgbhL._AC_SR768,1024_.jpg)
![Brown Smartwool Classic Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/819Kh8hGd2L._AC_SR768,1024_.jpg)
![Black Hot Chillys Kids Bi-Ply Crewneck (Toddler/Little Kids/Big Kids)](https://m.media-amazon.com/images/I/81H9HEcrq9L._AC_SR768,1024_.jpg)
Low Stock
![Green Smartwool Intraknit Thermal Merino Base Layer Pattern Crew](https://m.media-amazon.com/images/I/81BbOC3CmGL._AC_SR768,1024_.jpg)
Low Stock
![Gray Hanro Woolen Silk Long Sleeve Shirt](https://m.media-amazon.com/images/I/71i9Fim35hL._AC_SR768,1024_.jpg)
![Gray Hanro Woolen Silk Long Sleeve Shirt](https://m.media-amazon.com/images/I/81ZJsGL55mL._AC_SR768,1024_.jpg)
![Blue Hot Chillys Peach Skins Roll T-Neck](https://m.media-amazon.com/images/I/61Rw81OOKVL._AC_SR768,1024_.jpg)
![Blue Hot Chillys Peach Skins Roll T-Neck](https://m.media-amazon.com/images/I/719O+0JiI2L._AC_SR768,1024_.jpg)
![Black Smartwool Thermal Merino Rib Top](https://m.media-amazon.com/images/I/61gzmEUfpIL._AC_SR768,1024_.jpg)
Low Stock
![Black Under Armour Base 4.0 Crew](https://m.media-amazon.com/images/I/61C7keiLfiL._AC_SR768,1024_.jpg)
![Black Under Armour Base 4.0 Crew](https://m.media-amazon.com/images/I/714Tq5DIagL._AC_SR768,1024_.jpg)
![Blue Icebreaker Merino 260 Tech Long Sleeve Crewe](https://m.media-amazon.com/images/I/71g5xCdcvRL._AC_SR768,1024_.jpg)
![Blue Icebreaker Merino 260 Tech Long Sleeve Crewe](https://m.media-amazon.com/images/I/81F+2WBsmEL._AC_SR768,1024_.jpg)
Low Stock
![Blue Smartwool Kids Classic Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/61k2kOSB31L._AC_SR768,1024_.jpg)
Low Stock
![White NIC+ZOE Boatneck Tank](https://m.media-amazon.com/images/I/71BnHAw9ONL._AC_SR768,1024_.jpg)
![White NIC+ZOE Boatneck Tank](https://m.media-amazon.com/images/I/71xKy7e2MVL._AC_SR768,1024_.jpg)
![Gray Icebreaker 125 ZoneKnit™ Short Sleeve Crewe](https://m.media-amazon.com/images/I/61PuXQDJJBL._AC_SR768,1024_.jpg)
![Gray Icebreaker 125 ZoneKnit™ Short Sleeve Crewe](https://m.media-amazon.com/images/I/81hdSkSTbyL._AC_SR768,1024_.jpg)
Low Stock
![Black Smartwool Classic Thermal Merino Base Layer 1/4 Zip Plus](https://m.media-amazon.com/images/I/61bTRquEWZL._AC_SR768,1024_.jpg)
![Black Smartwool Classic Thermal Merino Base Layer 1/4 Zip Plus](https://m.media-amazon.com/images/I/81MfngQdbkL._AC_SR768,1024_.jpg)
![Gray Icebreaker Merino 200 Oasis Long Sleeve Crewe Cloud Dye](https://m.media-amazon.com/images/I/71WJxicvM8L._AC_SR768,1024_.jpg)
![Gray Icebreaker Merino 200 Oasis Long Sleeve Crewe Cloud Dye](https://m.media-amazon.com/images/I/81zyNt-T4NL._AC_SR768,1024_.jpg)
Low Stock
![Blue Dale of Norway Falkeberg Baselayer 1/2 Zip](https://m.media-amazon.com/images/I/71FQ3MkqpTL._AC_SR768,1024_.jpg)
![Blue Dale of Norway Falkeberg Baselayer 1/2 Zip](https://m.media-amazon.com/images/I/91s9rzdQVxL._AC_SR768,1024_.jpg)
Low Stock
![Black Dale of Norway Vail Baselayer 1/2 Zip](https://m.media-amazon.com/images/I/710mGB9FllL._AC_SR768,1024_.jpg)
![Black Dale of Norway Vail Baselayer 1/2 Zip](https://m.media-amazon.com/images/I/71HUETA+yjL._AC_SR768,1024_.jpg)
Low Stock
![Gray John Varvatos Chain Peace Tee KG6715W24](https://m.media-amazon.com/images/I/71j6fqXPt0L._AC_SR768,1024_.jpg)
![Gray John Varvatos Chain Peace Tee KG6715W24](https://m.media-amazon.com/images/I/81QXhL4yAgL._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Micro Elite Chamois Color-Block Zip-T](https://m.media-amazon.com/images/I/71TtIsYkYkL._AC_SR768,1024_.jpg)
![Black Hot Chillys Micro Elite Chamois Color-Block Zip-T](https://m.media-amazon.com/images/I/819HRDmsfFL._AC_SR768,1024_.jpg)
Low Stock
![Brown Sanctuary Half Sleeve Perfect Mesh Tee](https://m.media-amazon.com/images/I/71myMoeAzpL._AC_SR768,1024_.jpg)
Low Stock
![Blue Hot Chillys Micro-Elite Chamois Zip-T](https://m.media-amazon.com/images/I/61hkcQ9E5eL._AC_SR768,1024_.jpg)
![Blue Hot Chillys Micro-Elite Chamois Zip-T](https://m.media-amazon.com/images/I/81OPZIS3V5L._AC_SR768,1024_.jpg)
Low Stock
![Navy KARI TRAA Lune 1/2 Zip](https://m.media-amazon.com/images/I/818PNcqxT8L._AC_SR768,1024_.jpg)
Low Stock
![Black Falke Wool Tech Long Sleeve](https://m.media-amazon.com/images/I/819dYTXLNxS._AC_SR768,1024_.jpg)
![Black Falke Wool Tech Long Sleeve](https://m.media-amazon.com/images/I/813rTQf1BkS._AC_SR768,1024_.jpg)
Low Stock
![White Arc'teryx Rho Merino Wool Long Sleeve Crew](https://m.media-amazon.com/images/I/71tOIwF7k+L._AC_SR768,1024_.jpg)
![White Arc'teryx Rho Merino Wool Long Sleeve Crew](https://m.media-amazon.com/images/I/71Pg51dm-8L._AC_SR768,1024_.jpg)
Low Stock
![Black Hot Chillys Crewneck Peachskins](https://m.media-amazon.com/images/I/81Z+4m3x-mL._AC_SR768,1024_.jpg)
![Black Hot Chillys Crewneck Peachskins](https://m.media-amazon.com/images/I/81pf70X65ZL._AC_SR768,1024_.jpg)
Low Stock
![Navy Spyder Kids Bug 1/2 Zip (Toddler/Little Kid)](https://m.media-amazon.com/images/I/71SMrgRc95L._AC_SR768,1024_.jpg)
![Navy Spyder Kids Bug 1/2 Zip (Toddler/Little Kid)](https://m.media-amazon.com/images/I/916Glq5ot-L._AC_SR768,1024_.jpg)
Low Stock
![Blue Lacoste Kids Short Sleeve Jersey Tee (Little Kid/Toddler/Big Kid)](https://m.media-amazon.com/images/I/71IAioVXNhL._AC_SR768,1024_.jpg)
Low Stock
![Multi Smartwool Plus Size Classic All-Season Merino Base Layer Long Sleeve](https://m.media-amazon.com/images/I/71i6pLnKX4L._AC_SR768,1024_.jpg)
Low Stock
![Purple Smartwool Intraknit Thermal Merino Base Layer Crew](https://m.media-amazon.com/images/I/71ObIP7ZQJL._AC_SR768,1024_.jpg)
Low Stock
![Blue Icebreaker Oasis Short Sleeve Crewe](https://m.media-amazon.com/images/I/71LRV6cIzDL._AC_SR768,1024_.jpg)
![Blue Icebreaker Oasis Short Sleeve Crewe](https://m.media-amazon.com/images/I/716r0xzG2zL._AC_SR768,1024_.jpg)