Amazon has Skechers Men's Go Walk Slip Ins Stretchable Straight Leg Pants (Bold Black or Heather Charcoal) on sale for $24.30. Shipping is free w/ Prime or on $35+ orders.

• Fabric: 88% Nylon, 12% Spandex
• UPF 40+ moisture-wicking, 4-way active stretch fabric made from a premium air textured nylon yarn and a drawn twisted spandex.
• Soft cotton-like hand feel and matte finish.
• Elastic waistband with interior adjustable drawcord.
• Front slash pockets and back flap pockets with mesh lining
• Hidden zip security pocket
• Machine Wash