Nike offers Nike Men's Flex Experience RN 8 Shoes for $33.97 (reg $65). Plus, Nike+ members receive free shipping. 

Product Description:
The Nike Flex Experience RN 8 delivers lightweight comfort that conforms to your every step. Soft knit material hugs your foot, while flex grooves in the outsole encourage an adaptive ride that's ready for wherever your route takes you.
Benefits

• Flex grooves in the outsole promote natural flexibility.
• Knit fabric conforms to your foot for a snug feel.
• Soft fabric in the heel gives an adaptive fit.
• No-sew overlay at the laces adds durability.
• Injected unit midsole provides a resilient ride and enough durability to double as an outsole. This allows for a reduction in rubber and overall weight.
• Hexagonal flex grooves offer 6 different flex points for running freely.
• Textured outsole provides additional traction and durability.
• Rounded heel rolls with the ground, promoting a natural range of motion.