Amazon has the 5-Pack Hanes Men's Cool Comfort Breathable Mesh Brief (sizes small to XL) for $9 with free shipping on $25+ or with Prime. List price: $16. It features a lightweight, breathable mesh fabric. Has excellent Amazon Reviews.
Amazon has the Champion Women's Powerblend Graphic Hoodie (Select Colors) for $22 with free shipping for Prime members or on $25+. Features 60% polyester, 40% cotton, pull on closure, raglan sleeves, exaggerated ribbed cuff, ribbed waistband.
Amazon has the 5-Pack Gildan Men’s V-Neck T-Shirts (Assorted Colors) for $9.00 with free shipping on $25+ or with Prime. List price: $15. Available in select sizes S to XL.
Has good Amazon Reviews.