Calvin Klein Underwear - Monolith Lounge Sleep Pants. Color Grey Heather. Low Stock. On sale for $24.97. MSRP $59.50.. 4.0 out of 5 stars1 left in stockBrand NameCalvin Klein UnderwearProduct NameMonolith Lounge Sleep PantsColorGrey HeatherPrice$24.97MSRP: $59.50