Slippers for men

I've been busy today making my first product for men, slippers! I've tried the first pair out as a size 8 - 9.5 but also have some shoe lasts for size 9.5 - 11 and the design is more simple than the girly ones. No silk or lace, didn't think boys would like that so much : )

I'm still to add the cotton edging to neaten them up and add the non slip soles, then taadaa! what do you guys think, are they macho enough? : )