Men's 260 Tech Long Sleeve Crew Merino Baselayer boots The Big Zip EVO delivers

The Big Zip EVO delivers a significantly higher flow rate than previous Platypus reservoirs and a host of new features

The patented Big Bite™ Valve mouthpiece offers hands-free hydration and is ideal for any high-performance situations

Seam-taped bathtub floor helps keep water out

You can be sure to stay dry with GORE-TEX® light

Men's 260 Tech Long Sleeve Crew Merino Baselayer boots The Big Zip EVO deliversOur midweight mens baselayer for cold conditions, the 260 Tech Long Sleeve Crewe is a go to piece for winter layering. Features 100% Merino Soft merino fibers that regulates body temperature in all weather conditions and resists odors Gusseted underarms for mobility and comfort Offset shoulder seams to prevent friction Flatlock seams to prevent friction Backward set side seams to prevent friction Merino is super lightweight, soft, non itchy, non