M's Keystone Long Sleeve

The Keystone Long Sleeve is a premium everyday tech shirt built for comfort, performance, and durability. Designed to work as a standalone piece or as a baselayer, it’s warm, breathable, and made from recycled materials with a clean, versatile look. Fit Original Fit – tailored shape that follows body lines without being too tight or loose Designed for layering or wearing on its own Model is 5'11", 165 lbs, wearing size Medium Features Sweat-wicking and quick-drying performance Naturally odor-resistant High thermal insulation for warmth without bulk Interior hanger loop for convenience Construction Custom neck taping for comfort Seamless underarm design High armholes for full mobility Flatlock stitching to reduce chafing Subtle branding for versatile wear Drop rear hem for extra coverage Fabric designed with no shrinkage Materials 82% GRS Certified Recycled Polyester, 15% Tencel, 3% Spandex Fabric weight: 230 gsm Roll-packed without plastic using paper twine and recycled paper hangtags Care Machine wash cold with like colors Tumble dry low Iron low Production & Sustainability Made in Vietnam in verified fair labor and environmentally responsible facilities Backed by LIVSN’s lifetime warranty and in-house repair program