Kylie Jenner and Timothée Chalamet must’ve packed light for their trip to Los Cabos, because they went shopping for some sexy swimwear … and it’s all on video.

Check out this viral footage showing Kylie and Timothée browsing around a clothing shop in Mexico this weekend … they go straight for the bikini section, and TC helps KJ pick out the perfect piece.

We saw Timothée wearing the same hat around a Cabo marina, and we’ve seen Kylie rocking a skimpy black swim top at their swanky, oceanfront resort … but it’s unclear if Kylie purchased that bikini on this shopping excursion.

As we first told you … Kylie and Timothée had an intimate date night at Flora Farms in San Jose del Cabo … and they also got close on a fancy yacht.