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