Although I think it is it technically running gear, I've purchased tights and tops with back pockets at Target. They carry Champion brand and the clothes arent' too shabby. The tights I found on a clearance rack for $15 and this was my 3rd winter using them. They've held up better than my Trek pair actually.
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"We don't stop playing because we grow old; we grow old because we stop playing." George Bernard Shaw
Luna Eclipse/Selle Italia Lady
Surly Pacer/Terry Butterfly
Quintana Roo Cd01/Koobi Stratus
1981 Schwinn Le Tour Tourist
Jamis Coda Femme