eBay has the adidas 3-Stripes Men's Track Suit (Black, White) for $35 with free shipping. Features 100% recycled polyester tricot, regular fit strikes a comfortable balance between loose and snug.

Amazon has the Calvin Klein Men's Underwear Cotton Stretch 3 Pack Trunks for $26 with free shipping. List price: $43. Has good Amazon Reviews.

Amazon has the Levi's Men's Undershirts 3 Pack - Short Sleeve Cotton Crew Neck Tshirts for Men for $20 with free shipping on $25+ or with Prime. Breathable light and and made from soft 100% premium cotton fabric.

Has excellent Amazon Reviews.

Amazon has the StoreOfBaby Girls' and Women's 2-Piece Swimsuit for $21 - $7 off with coupon 35IR8274 = $14 with free shipping for Prime members or on $25+. Available in girls' sizes 2-3T to 9-10 and women's sizes S to XXL.

Amazon has the Fruit of the Loom Men's Stay Tucked Crew T-Shirt 8-Pack for $13 with free shipping for Prime members or on $25+. Features 50% cotton, 50% polyester, wicks moisture, machine wash cold with like colors.