Sneaker technology has advanced far beyond the days of stone-chiseled soles, wheat-woven heals, and steam-powered shoelaces. Step into the future with today's Groupon: for $40, you get $80 toward athletic shoes from Spira Footwear's online store. Groupon purchasers receive free delivery.
Defined by the patented, lifetime guaranteed WaveSpring, a compact mechanical cushioning system that reduces ground impact forces by 20% so wearers can saunter longer, Spira cobbles specialized athletic shoes for all walks and sprints of life. This energy-recycling technology is ideal for committed athletes, with running shoes for male and female marathonistas, comfy kicks for men and women power-walkers, and high-tech slippers for 100-meter channel surfers. The hornet-hued Stinger ($105), available in limited, select sizes and set to return in an updated model later this year, is an elite unisex road-runner designed specifically to maximize performance and reduce fatigue. Spira also carries the sober black WaveWalker ($94.95), replete with cutting-edge cushions and eschewing speed for comfort. Watch the closeout page for retiring favorites, such as the men's Volare 3 ($79.95), or the Mesa ($89.95), a sleek slip-on for women that, like all of Spira's footsheaths, simulates air-walking without the need for bulky hovershoes.