Women's Skechers Go On The Go Flex Radiant 138546 The Skechers On-The-GO Flex Radiant - Sirena is a casual boat shoe built for easy everyday wear. Its linen upper, fixed stretch laces, and slip-on design create a flexible fit that works well for errands, travel, and laid-back daily use. Lightweight ULTRA GO cushioning and a Skechers Air-Cooled Goga Mat insole help add responsive comfort underfoot.