The Endorphin franchise expands with a high-tech training powerhouse. Built for runners who demand both speed and durability, the Endorphin Trainer running shoe brings race-day innovation to everyday training. At its core, a top layer of IncrediRUN superfoam—our lightest, most responsive midsole—pairs with a durable bottom PWRRUN layer to create an ultra-stable, energy-efficient platform. A ¾-length carbon fiber plate, tuned specifically for training, works with Speedroll Technology to propel you forward, ensuring smooth transitions and effortless toe-offs. The result? A shoe that harnesses cutting-edge innovation to make high-mileage weeks and everyday training feel smoother, faster, and more efficient.

Features & Benefits

• Unmatched Efficiency: IncrediRUN superfoam and PWRRUN layering create the ideal balance of energy return, cushioning, and durability for high-performance training
• Carbon-Fiber Propulsion: A ¾-length carbon fiber plate, tuned specifically for training, enhances toe-off while ensuring smooth landings.
• Ultimate Comfort: A structured engineered mesh upper with a traditional foam package ensures secure lockdown and plush comfort over long distances.
• Durable Traction: XT-900 carbon rubber strategically placed in high-wear zones offers the grip and longevity of a daily trainer without sacrificing speed

Specs

• Bet for: Daily run/ Workout/ Casual movement
• Heel-to-toe Offset: 8mm (41/33mm)
• Weight: 9.9oz (280g)

Shipping Policy

• C$35 for orders total under C$99
• C$25 for orders total between C$100 – C$250
• C$15 for orders total more than C$250

Customers are required to cover postage on all returns unless the item(s) in question are defective. We will cover your return postage if the error is our fault (defective or wrong item sent).

All returns and refunds need to be approved prior to returning.
Please email info@atrsports.com to process the refund/return.

PRODUCT RETURN CONDITIONS

Racquets:

• To be eligible for a return all racquets must be in brand new condition. 
• If used or restrung, racquets are no longer returnable. Plastic wrap on the handle must be intact.

Footwear: 

• When trying on footwear for the first time we ask that clean socks be worn. 
• Please make sure to test the footwear indoors on a carpeted surface, so as not to damage the soles. 
• The original shoe box must be returned alongside the footwear. Please be sure to place the shoe box inside a shipping box so as to prevent damages during transit. If these conditions are not met we will not be able to process the return and refund.

Apparel: 

• All original tags must still be attached to the garment(s). 
• Please be mindful of deodorant, makeup or perfume that may rub off on the garment, and beware of jewelry that may catch or tear fabric. 
• Apparel that is returned damaged, or has been worn, will not be refunded

Bags:

• All bags must contain original tags and returned in the same condition as sold.

Strings: 

• Sets and reels of string may be returned if they are still in the manufacturer's packaging, unopened and unused. 

Accessories: 

• Overgrips, Dampeners, Goggles, and other all other  accessories may only be returned if original packing is intact and accessories are unused. 

Balls: 

• To be eligible for a return, tennis ball cases and tubes must be unopened. 
• If opened we are unable to accept them as a return, due to the fact they become depressurized after opening the seal. 

Damaged/defective items: If you believe an item is defective or damaged, please contact us via email: sales@atrsports.com.

The following items are NOT eligible for refund or exchange:

• Items that have been used, worn, washed, or smell of perfumes, scents, or odor.
• Shoes that have sock fuzz, lint, hair, dirt or any other foreign substance inside the shoe, or if there is any visible wear inside the shoe, on the soles, or if there is any pebbles, stones or clay material embedded in the sole.
• Racquets that have been regripped or restrung. 
  
  

• Sale items over 40% off are FINAL SALE.

• Items that do not abide by our return policy conditions will not be eligible for a return and or refund. 

Once the returned merchandise has been quality checked and approved, ATR Sports will issue a refund to the original method of payment and a confirmation e-mail will be sent to you. 

Please note that it may take up to 5 business days after receiving the merchandise to process the return request. 

It may take your financial institution additional time to process the transaction and update your bank statement. Please note that during busy Sale Seasons or holiday periods, this process may take a little longer.