By Jennifer Davis
May 31, 2016 @ 4:15 pm

Kendall and Kylie Jenner did Memorial Day right. The sisters hosted an epic backyard bash for a few of their closest BFFs, including Hailey Baldwin, Jaden Smith, and Jordyn Woods, on Monday, and they took to social media to document their day of fun in the sun as well as their racy bikinis.

Kylie shared several Instagrams, including the photo above of her and her pals all wearing itsy-bitsy bikinis as they lounged poolside. "Girls girls girls," she captioned the artsy shot, which shows her and big sis Kendall posing in the middle of their friends.

Kylie's black swimsuit isn't your ordinary bikini—the top features three pieces of fabric connected to a T-strap with coordinating high-slit bottoms. Meanwhile, Kendall wears a white two-piece suit that has even more straps than her sister's. Cleary, tans lines aren't a worry for these two. 

Their friend Cami Morrone also shared a similar shot that gives you a closer look of their intricate swimwear (below). 

Basic | 📸: @yourboyfai

A photo posted by Camila Morrone (@camimorrone) on

RELATED: Kylie Jenner and Hailey Baldwin Take Matching Tattoo Pics, Further Prove Their BFF Status

It wasn't just poolside photo shoots and dips in the pool—they also all played with inflatable toys in the grass. Scroll down to see them goof around inside the blow-up balls, plus more pics from their incredible pool party.

save the drink

A photo posted by Kendall Jenner (@kendalljenner) on

Girls love balls !

A photo posted by LP (@lauren_perez) on

My exotic family

A photo posted by Heir Jordyn (@jordynwoods) on

If this didn't make u laugh... We failed

A photo posted by Hailey Baldwin (@haileybaldwin) on