A stack assembly, comprising: a glass element having a first thickness from about 25 μm to about 125 μm, and a first and a second primary surface, the glass element further comprising: (a) a first glass layer having a first and second primary surface (206, 206a), and (b) a compressive stress region extending from the second primary surface of the glass layer to a first depth in the glass layer, the compressive stress region defined by a compressive stress of at least about 100 MPa at the second primary surface of the glass layer; and a second layer coupled to the second primary surface of the glass layer having a second thickness, characterized in that the compressive stress region comprises a plurality of ion-exchangeable metal ions and a plurality of ion-exchanged metal ions, the ion-exchanged metal ions selected so as to produce compressive stress, the second layer comprises a composite of a polyethylene terephthalate or polymethyl methacrylate sub-layer and an optically clear adhesive sub-layer, the optically clear adhesive sub-layer coupled to the second primary surface of the glass layer, and wherein the thicknesses and elastic moduli of the sub-layers (240, 220) of the second layer and the glass layer are configured to shift a neutral axis substantially toward the second primary surface of the glass layer, the glass element comprises: (a) an absence of failure when the glass element is held at a bend radius from about 3 mm to about 20 mm for at least 60 minutes at about 25°C and about 50% relative humidity, (b) a puncture resistance of greater than about 14.71 N (1.5 kgf) when the second primary surface of the glass element is supported by (i) an approximately 25 μm thick pressure-sensitive adhesive having an elastic modulus of less than about 1 GPa and (ii) an approximately 50 μm thick polyethylene terephthalate layer having an elastic modulus of less than about 10 GPa, and the first primary surface of the glass element is loaded with a stainless steel pin having a flat bottom with a 200 μm diameter, (c) a pencil hardness of greater than or equal to 8H, and (d) the neutral axis within the glass layer that is located between the second primary surface and half of the first thickness. a glass element having a first thickness from about 25 μm to about 125 μm, and a first and a second primary surface, the glass element further comprising: (a) a first glass layer having a first and second primary surface (206, 206a), and (b) a compressive stress region extending from the second primary surface of the glass layer to a first depth in the glass layer, the compressive stress region defined by a compressive stress of at least about 100 MPa at the second primary surface of the glass layer; and (a) a first glass layer having a first and second primary surface (206, 206a), and (b) a compressive stress region extending from the second primary surface of the glass layer to a first depth in the glass layer, the compressive stress region defined by a compressive stress of at least about 100 MPa at the second primary surface of the glass layer; and a second layer coupled to the second primary surface of the glass layer having a second thickness, characterized in that the compressive stress region comprises a plurality of ion-exchangeable metal ions and a plurality of ion-exchanged metal ions, the ion-exchanged metal ions selected so as to produce compressive stress, the second layer comprises a composite of a polyethylene terephthalate or polymethyl methacrylate sub-layer and an optically clear adhesive sub-layer, the optically clear adhesive sub-layer coupled to the second primary surface of the glass layer, and wherein the thicknesses and elastic moduli of the sub-layers (240, 220) of the second layer and the glass layer are configured to shift a neutral axis substantially toward the second primary surface of the glass layer, the glass element comprises: (a) an absence of failure when the glass element is held at a bend radius from about 3 mm to about 20 mm for at least 60 minutes at about 25°C and about 50% relative humidity, (b) a puncture resistance of greater than about 14.71 N (1.5 kgf) when the second primary surface of the glass element is supported by (i) an approximately 25 μm thick pressure-sensitive adhesive having an elastic modulus of less than about 1 GPa and (ii) an approximately 50 μm thick polyethylene terephthalate layer having an elastic modulus of less than about 10 GPa, and the first primary surface of the glass element is loaded with a stainless steel pin having a flat bottom with a 200 μm diameter, (c) a pencil hardness of greater than or equal to 8H, and (d) the neutral axis within the glass layer that is located between the second primary surface and half of the first thickness. (a) an absence of failure when the glass element is held at a bend radius from about 3 mm to about 20 mm for at least 60 minutes at about 25°C and about 50% relative humidity, (b) a puncture resistance of greater than about 14.71 N (1.5 kgf) when the second primary surface of the glass element is supported by (i) an approximately 25 μm thick pressure-sensitive adhesive having an elastic modulus of less than about 1 GPa and (ii) an approximately 50 μm thick polyethylene terephthalate layer having an elastic modulus of less than about 10 GPa, and the first primary surface of the glass element is loaded with a stainless steel pin having a flat bottom with a 200 μm diameter, (c) a pencil hardness of greater than or equal to 8H, and (d) the neutral axis within the glass layer that is located between the second primary surface and half of the first thickness.