Kristaps Porzingis is sleeping well these days — though Friday night might be a little tougher bed rest than most.
Before training camp opened, Porzingis took a tour of Shifman Mattress factory in Newark. The company promised to build him a special mattress — 18 inches longer than the regular king bed he had been sleeping on the past two months.
It finally arrived last weekend. Porzingis is 7-foot-3. OK, late at night, without sneakers, he’s really “just” 7-1.
“It’s great — it’s just so huge,’’ Porzingis told The Post before Friday’s 99-92 loss to the Bucks at the Garden.