We designed the HIIT Trainer for an accommodating yet supportive fit. We recommend choosing your regular size for this model.
HIIT Trainer Highlights
Plant-powered Knit Upper
Responsive, Algae-based Cushioning
Built for High Impact Moves
Meet your workout’s new best friend. With a made-for-you fit, plant-based knit, and impact-ready reinforcements, these fitness-focused trainers take your gym sessions to the next level without sacrificing style, comfort, or sustainability.
Size & Fit
The HIIT Trainer fits true-to-size.
Bonus: our shoes are unisex, with men’s and women’s styles offering the same fit. This means sizes can be converted to suit a wider range of people. Men’s sizes are 1 full US size smaller than women’s. For example, if you are a women’s US 10, you can also purchase a men’s US 9 for a perfect fit.
Shipping & Returns
We offer free shipping and free returns on all orders, as well as a 30-day free returns period from the time you place your order. If you’re not sold by day 30, you can return your shoes for a full refund no questions asked, even if you’ve been staying active in them. Please note, we only offer either one return or exchange per order.
If your shoes are starting to look a little less-than-fresh, we’ve got some simple tips on how to keep your Trainers looking their best – Read here!
Algae Bloom Midsole
Lightweight, full-length, algae-based BLOOM foam midsole that offers bounce and a plush feeling underfoot for all-day comfort. Every pair returns 31.5 liters of fresh water back to the environment, and removes 64 cubic meters of carbon from the atmosphere.
Tencel Knit Upper
100% plant-based upper features eucalyptus-derived lyocell and cotton. Smooth to the touch, moisture-wicking, and ultra-breathable, with engineered zones for ventilation, support, and stretch.
Rigid, full-length TPU sidewalls on the lateral and medial side contain the ETPU midsole. Ensures side-to-side stability during hard cuts and lateral movements so you can move in confidence.
Full-length, cushy ETPU sockliner is composed of ETPU pellets in a PU matrix. These squishy little beads offer unparalleled comfort, and won’t go flat like typical sockliners.
Vegan Microfiber Overlays
Vegan Microfiber is more lightweight than leather, but just as durable. Panels have been placed across the upper to increase containment and support, and add abrasion-resistance in high-wear areas.