Adidas UltraBOOST 21 Primeblue M Review

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Relive the entire live testing in replay on i-Run.fr, and discover the strengths of UltraBOOST 21!

Range of the iconic three stripes , the adidas UltraBOOST 21 Primeblue shoe for man reinvents itself to take your running sessions to a new level . To continue to write its legend , it presents undeniable qualities that make it your most formidable asset on roads and marked paths .

Through years of innovation and  testing , the midsole design is made to showcase your exploits . In this perspective, it benefits from an addition of 6% of BOOST compared to its previous version. This gives you cushioning that can absorb impact with the ground before rewarding the power of your strides  with unparalleled energy return . 

With the sole aim of guaranteeing you an extremely fluid foot roll , the curvature of the heel is deliberately exaggerated to offer you a balancing effect . The latter thus promotes a transition that optimizes your effort to help you reach the finish line in the best conditions . The set is combined with the innovative Linear Energy Push process which stiffens the forefoot by 15% in  order to give you exceptional reactivity and propulsion particularly suited to your quest for records . 

Assembled with the recycled material Primeblue which incorporates the Parley Ocean Plastic textile , the upper manages to combine performance and ecology brilliantly . The Primeknit Construction +  adjusts perfectly to the shape of your foot and gives you a reassuring continuation in key areas .

Breathable , the upper lets air circulate to ensure an inexhaustible source of freshness . The  shoe making  and  cage midfoot  are guarantees of a  wrap  accurate and a  support  reliable while  reinforcements heel secure your catch downforce .

Versatile , the Stretchweb Continental outsole  promises you  flawless grip on many surfaces , dry or wet . Built for prowess , it has flexible properties that are essential for you to grow to your fullest potential .

Highlights of the  adidas UltraBOOST 21 Primeblue shoe

• Midsole with 6% more Boost  : cushioning, energy return, comfort and durability
• Curved heel and pendulum effect : smooth flow of the foot and optimized energy expenditure
• Linear Energy Push : 15% additional stiffness in the forefoot, responsiveness and propulsion
• Primeknit +  : fit, comfort and targeted support
• Primeblue : recycled materials incorporating Parley Ocean Plastic fabrics
• Liner design : fit and comfort
• Breathable upper : breathability and freshness
• Cage in the midfoot  : support
• Heel reinforcements  : support
• Stretchweb Continental outsole  : grip, traction and flexibility
• Removable insole: cushioning, comfort and hygiene
• Drop  : 10 mm
• Average weight observed at i-Run  : 350 g in size 42
• Colors  : arctic white, translucent white, pearl gray and white