すね毛 is read as すねげ (sunege) and means leg hair.
すねげ
sunege
け
hair
かみのけ
hair (of the head)
ふもう
unproductive (e.g. discussion)
うもう
feathers
あかげ
red hair
ぬけげ
fallen hair
かわらげ
buckskin (horse color)
さいせいもう
recycled wool
いちもう
one-tenth of a rin
みけ
calico (pattern)
つきげ
palomino
ちょうもう
longhair (e.g. cat)