Vital S1 Long Sleeve Crew | Verde

DESCRIPTION

Best For: Ultralight Base Layer

Boosted by XLANCE®, the all-new Vital S1 is our lightest and most comfortable synthetic base layer to date. With an ultralight 105 g/m² fabric weight and a mesh matrix for high breathability, it offers a silky next-to-skin feel with exceptional moisture-wicking and quick-drying performance—perfect for high-output ascents followed by extended glassing sessions and the unpredictable temperature swings of mountain hunting.

XLANCE brings entirely new performance to hunting apparel: an advanced polyolefin-based stretch yarn with built-in resistance to sweat, chemicals, heat, ozone, and UVA/UVB radiation. This delivers long-lasting elasticity and garment durability while staying incredibly light. It overcomes the typical pitfalls of spandex and elastane —excess weight, bacterial odor retention, slow drying, and loss of shape over time.

Unlike the aggressive snap-back of traditional elastane, XLANCE provides gentle, low-force stretch that's noticeably more comfortable and fatigue-free during dynamic movement, yet it maintains excellent recovery for season-after-season reliability.

FEATURES

• Hybrid Raglan sleeve for enhanced no-lift articulation
• Flatlock seams for non-chafing comfort
• Drop-back hem
• UPF 30 sun protection
• Moisture wicking
• Quick drying
• 4-way stretch
• Odor resistant

DETAILS

• 72% Polyester / 21% XLANCE® / 7% IONIC+ – 105 g/m²
• XLANCE – UV- and sweat-resistant stretch fiber for superior durability and shape retention
• IONIC+ – Antimicrobial treatment is extruded in the yarn instead of a topical treatment so it lasts the life of the garment

Fit & Layering

Athletic next-to-skin fit designed to layer seamlessly under same-size mid and outer pieces. Upsize only if you're between sizes or want a relaxed feel.

Layering Example – Early Season Mountain Hunt:

* For an individual who measures size XL:

Base Layer: Vital S1 Crew – XL
Mid-Layer- Fleece: StrongFleece 190 Zip-T – XL
Mid-Layer- Insulated: Kenai Jacket – XL
Outer Layer- Waterproof Rain Gear: Chugach TR Rain Jacket – XL

Additional Resources:

Fit & Layering Guide

KUIU Layering System

Weight

5.1 oz / 145 g (L)

Protection

UPF 30 Sun Protection, IONIC+ Odor Control, Moisture Wicking

Materials

Polyester, XLANCE, IONIC+ - 105 g/m²

Conditions

Hot to Mild

Layering Position

Base Layer