The Arc'teryx Motus AR Crew Long-Sleeve Top is one of those layers you'll find yourself reaching for regardless of what activity you're getting into. Designed as a lightweight base layer, the Motus AR Crew is made from Arc'teryx Phasic™ AR II fabric which means it's incredibly breathable and moisture wicking while the trim cut and stretchiness enable you to move freely. Whether you're out heading out on a trail run, ski touring, or backpacking, the Arc'teryx Motus AR Crew Long-Sleeve Top is a smart choice.