An enclosure comprising first and second mating members (4, 2) and a latch system for securing the first mating member to the second mating member, the latch system comprising: a deflecting arm on one of the first mating member and the second mating member for engaging a corresponding feature on the other member, the deflecting arm comprising a deflecting arm surface configured such that when the first and second mating members (4, 2) are moved towards engagement, the deflecting arm surface will flex when moved over the corresponding feature and then return to its original shape as the deflecting arm and the corresponding feature engage, thereby locking the mating members in place; characterized in that the latch system further comprises: a tee feature on the first mating member, the tee feature having a head and a stem, the stem extending between the head and a base on the first mating member; a receiving slot on the second mating member to slidingly receive the stem of the tee feature; and a deflection slot positioned between the deflecting arm and one of the tee feature and the receiving slot; wherein when the first and second mating members (4, 2) are locked in place, the stem extends in a direction predominantly perpendicular to the deflecting arm surface and at least a portion of the second mating member adjacent the receiving slot is sandwiched between the head and a portion of the first mating member adjacent the base of the stem. a deflecting arm on one of the first mating member and the second mating member for engaging a corresponding feature on the other member, the deflecting arm comprising a deflecting arm surface configured such that when the first and second mating members (4, 2) are moved towards engagement, the deflecting arm surface will flex when moved over the corresponding feature and then return to its original shape as the deflecting arm and the corresponding feature engage, thereby locking the mating members in place; characterized in that the latch system further comprises: a tee feature on the first mating member, the tee feature having a head and a stem, the stem extending between the head and a base on the first mating member; a receiving slot on the second mating member to slidingly receive the stem of the tee feature; and a deflection slot positioned between the deflecting arm and one of the tee feature and the receiving slot; wherein when the first and second mating members (4, 2) are locked in place, the stem extends in a direction predominantly perpendicular to the deflecting arm surface and at least a portion of the second mating member adjacent the receiving slot is sandwiched between the head and a portion of the first mating member adjacent the base of the stem. a tee feature on the first mating member, the tee feature having a head and a stem, the stem extending between the head and a base on the first mating member; a receiving slot on the second mating member to slidingly receive the stem of the tee feature; and a deflection slot positioned between the deflecting arm and one of the tee feature and the receiving slot; wherein when the first and second mating members (4, 2) are locked in place, the stem extends in a direction predominantly perpendicular to the deflecting arm surface and at least a portion of the second mating member adjacent the receiving slot is sandwiched between the head and a portion of the first mating member adjacent the base of the stem.