Friendly Shoes - SINGLE SHOE - Friendly Flex. Color Castlerock Grey. Low Stock. On sale for $11.99. MSRP $39.97.. 4.7 out of 5 stars3 left in stockBrand NameFriendly ShoesProduct NameSINGLE SHOE - Friendly FlexGenderMen'sColorCastlerock GreyPrice$11.99MSRP: $39.97