Men's AFO Vent Tank - Jasper

$40 $58

Sorry, this product is currently out of stock.


Hit the trail in the AFO-Vent Tank — this lightweight, 4-way stretch tech top is made from a micro-perforated, abrasion resistant fabric for extra-breathable, durable running comfort. Low-profile, mini-binding collar and armholes are strategically designed to accommodate a hydration vest or pack.

Lightweight yet tough - AFO-Vent is a durable, 4-way stretch nylon fabric that is abrasion resistant, retains its shape, resists odors, wicks moisture + dries quickly

Perforated venting - Micro-perforations enhance breathability

Minimal trims, pack compatible - Low-profile, mini-binding collar + armholes provide smooth, flat lying comfort to optimally accommodate hydration vests or packs

Smooth finish - Bonded hemline provides an anti-chafe, clean finish

Stay seen - Janji signature reflective logo on front chest + “watermark” reflectivity on back increase visibility in low light

Materials + Specs

88% recycled polyester, 12% elastane

Performance brief liner
94% polyester, 6% spandex

106g / 3.7oz (M’s Medium)

Garment made in Vietnam

Fabric Callout


Ultra-light and fast drying, AFO is a stretch woven made from recycled polyester. We use it across our Singlets, Splits, Middle Shorts, and 2-In-1 Traverse Shorts for high-performance styles that feel lighter-than-air.


Our AFO fabric is composed of 88% recycled polyester. We use high-grade recycled polyester made from 100% post-consumer recycled plastic like rPET (commonly found in single-use bottles and containers) to reduce the impact of our apparel without compromising on performance, durability or comfort. 

AFO fabric is also bluesign® certified meaning it is free from harmful chemicals and is fabricated in a way that meets a high environmental standard.

Learn more about our sustainable initiatives here.

 Color: Jasper