One thing that makes Fortnite unique is the time-specific availability of unique skins. Developers constantly drop new cosmetic items, whether they be skins, bundles, gliders, or more. Given their niche status, the hype around these items is usually intense.This is partially due to how Epic Games manages its inventory. The company has a unique way of managing the Item Shop inventory to ensure skins remain popular with new and old crowds.While skins come and go, some are so rare that they only appear once in the Item Shop. These skins are highly coveted for obvious reasons.These Fortnite skins are yet to return to the Item Shop1) Aerial Assault TrooperThis rare outfit has stood to its name and is by far the rarest skin in the game. In Season 1, the Aerial Assault skin was available to all from the Season Shop after reaching Level 15. However, the skin hasn't been seen for very long now and is not owned by many players.Storm@FortniteLeaksRenegade raider Aerial assault trooper are now the most rarest skins in fortnite history. they were last seen "938" days ago.2:33 PM · May 27, 202096871Renegade raider Aerial assault trooper are now the most rarest skins in fortnite history. they were last seen "938" days ago. https://t.co/Tuo8Tt1JhX2) Renegade RaiderFortnite Chapter 1 Season 1 was packed with skins that haven't returned to the game ever since. Among them is the Renegade Raider skin. Players could only get the skin by reaching level 20. That would unlock the opportunity to buy it. Players were able to buy the skin for 1,200 V-Bucks.LavBoy Never Broke Again@lavPackAnybody selling or willing to trade with a fortnite renegade raider ? @Tee4PF09:48 AM · Jan 18, 2022121Anybody selling or willing to trade with a fortnite renegade raider ? @Tee4PF3) InfiltratorThis rare skin was first added to the shop during Chapter 1 Season 1. The skin was available for 1,200 V-Bucks. Only OG players have this skin, and you might also come across a few lobbies.FortniteVN@FortniteVN(Infiltrator) Details: fortnitevn.com/shop/outfit/in… #fortnite #fortnitevn #fortnitegame #fortnitebr #FortniteBattleRoyale #BattleRoyale12:50 PM · Jun 9, 20202(Infiltrator) Details: fortnitevn.com/shop/outfit/in… #fortnite #fortnitevn #fortnitegame #fortnitebr #FortniteBattleRoyale #BattleRoyale https://t.co/0XLQpCu8ra4) VectorVector (Image via Epic Games)The Vector skin was from the Total Control set, which was added during Chapter 1 Season 9. The skin was listed for 1,200 V-Bucks in the item shop and has not returned to the game ever since, making it one of the rarest Fortnite skins of all time.Disclaimer: This article reflects the opinions of the writer.